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INCOME TAXES (Income from continuing operations by location, the provision (benefit) for income taxes and the effective tax rate) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Jan. 02, 2016
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Income Tax Disclosure [Abstract]                      
United States operations                 $ (4,114) $ (12,600) $ 4,178
Foreign operations                 122,629 68,764 34,867
Income from operations before income taxes                 118,515 56,164 39,045
Income tax (benefit) / expenses $ 2,539 $ (17,657) $ 5,151 $ 2,573 $ (5,576) $ 7,619 $ 6,978 $ (1,312) $ (7,394) $ 7,709 $ (12,867)
Effective tax rate                 (6.20%) 13.70% (33.00%)